QLS60. Solar Impact Sensor. Sensor for acquiring the impact of solar radiation Output signal DC V 2-wire current output ma.

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1 P01 Solar Impact Sensor QLS60 Sensor for acquiring the impact of solar radiation Output signal DC V 2-wire current output ma Use The solar impact sensor is used as a reference sensor in heating, ventilation and air conditioning plants where compensation of solar radiation is required. Solar compensation is necessary where buildings or building sections with large window areas are subjected to strong solar radiation, especially in plants where thermostatic radiator valves cannot be used. Ordering When ordering, please give name and type reference: Solar impact sensor QLS60 Equipment combinations The sensor can be used in connection with all types of systems and devices capable of acquiring and handling the sensor s ma or DC V output signal. Technical design To determine the impact of solar radiation, the sensor uses a solar cell which acquires the level of radiation. That cell generates an electrical current depending on the extent of radiation, which is then evaluated by the sensor. As a result, the sensor delivers an output signal of ma or DC V, which is proportional to the solar radiation range. CE1N1943en Building Technologies

2 Mechanical design The solar impact sensor is designed for wall mounting. The cable must be introduced from the bottom. The sensor consists of plastic housing with a transparent cover and a Pg 9 cable entry gland. The solar cell is located in the cover, the sensor electronics with the connection terminals inside the housing. The cover is secured to the housing with 2 screws and can be removed. A rubber seal is used between housing and cover to ensure degree of protection IP 65. The measured values from the photocell to the sensor electronics are transmitted via a 2-wire connection. Housing closed Housing open Z01 U G I M Legend 1 Solar cell 2 Connection terminals 3 Rubber seal 4 Sealing gland (conduit adapter supplied for US / Asia Pacific) Engineering notes The correct mounting location of the sensor is decisive for achieving the desired effect. It must be determined by the planning engineer. The information given in section "Mounting and installation notes" must be observed. Power supply line and measuring line must be run together. The voltage output can be used only if the current output is not required. Mixed operation is not possible. The measuring voltage is calculated as follows: 10V U = E W / m where E = solar radiation in W/m 2 When using the current output, the voltage output cannot be used. The electronic circuit receives its power from the current supply. For that, the current measuring voltage must lie in the range of DC V. The measuring current is calculated as follows: 16 ma I = 4 ma E W / m where E = solar radiation in W/m 2 2/5

3 Fitting and installation notes When deciding on the mounting location, it should first be determined for which part of the building (heating zone) the sensor shall acquire the solar radiation. It must be located on the wall having the windows of the rooms that are affected by solar radiation. This is, in general: The wall of the heating zone with the window area which receives the largest part of solar radiation for the longest period of time As high as possible, but at least 3 m above the ground Easily accessible (to facilitate checking), approximately 30 cm beside a window Note: Not in the shade of trees, houses, telephone poles, etc. The sensor must not be painted over. 30 cm 1943Z Z Z04 > 3 m The solar impact sensor is supplied complete with Mounting Instructions. Commissioning notes When commissioning the plant, the wiring must be checked. No settings can be made on the sensor itself. Disposal The devices are considered electronics devices for disposal in terms of European Directive 2012/19/EU and may not be disposed of as domestic waste. Dispose of the device via the channels provided for this purpose. Comply with all local and currently applicable laws and regulations. 3/5

4 Technical data Power supply (G, M) Range of use Functional data Measured value outputs (U, I) Electrical connections Degree of protection Environmental conditions Directives and Standards Environmental compatibility Materials and colors Weight Rated voltage range AC 24 V ±20 % (SELV) or DC 24 V ( V) (SELV) Rated frequency at AC 24 V 50/60 Hz Rated power consumption max. 2.5 VA (1 W) External supply line protection Fuse slow max. 10 A or Circuit breaker max. 13 A Characteristic B, C, D according to EN or Power source with current limitation of max. 10 A Measuring range W/m 2 Time constant t 63 Voltage signal output (U) DC V W/m 2 Current signal output (I) ma W/m 2 Perm. cable lengths with copper cable 1.0 mm 2 50 m 1.5 mm m 2.5 mm m 2 s Screw terminals for 2 x 1.5 mm 2 or 1 x 2.5 mm 2 Protection degree of housing IP65 according to EN Protection class III according to EN Operation to IEC Climatic conditions Class 3K5 Temperature C Humidity (noncondensing) % r. h. Mechanical conditions Class 3M2 Transportation to IEC Climatic conditions Class 2K3 Temperature C Humidity <95 % r. h. Mechanical conditions Class 2M2 Product standard EN Electrical equipment for measurement, control and laboratory use. EU Conformity (CE) CE1T1943xx *) The product environmental declaration CE1E1943 *) contains data on environmentally compatible product design and assessment (RoHS compliance, materials composition, packaging, environmental benefit, disposal). Housing Housing cover Packaging Without packaging Polycarbonate / RAL 9002 (gray-white) Polycarbonate (transparent), solar panel moulded in silicone / RAL9010 cardboard approx kg *) The documents can be downloaded from 4/5

5 Connection diagrams Internal diagrams G Operating voltage AC 24 V or DC 24 V (DC V) M Measuring neutral (power supply and signal), Solar radiation measuring signal ma U Solar radiation measuring signal DC V I Operating voltage DC 24 V (DC V) Connection diagrams Voltage measurement with AC supply: DC supply: U G I (1) (2) (3) M (4) 1943A01 U G I (1) (2) (3) M (4) 1943A02 DC V AC 24 V DC V DC V Current measurement: Dimensions ,5 8 SW19 Drilling plan Dimensions in mm 1943M01 5/ Siemens Switzerland Ltd. Subject to change